EEG Spectrogram to Assess Brain Vulnerability as a Risk Factor for Postoperative Delirium in Older People - a Feasibility Study
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Sponsor
- University of Nottingham
- Enrollment
- 30
- Locations
- 1
- Primary Endpoint
- Feasibility of acquiring frontal and posterior EEG data from the Narcotrend monitor during the preoperative and intraoperative period
Study Overview
Brief Summary
An assessment of difference in prespecified processed electroencephalography variables between cognitively intact older surgical patients who develop postoperative delirium compared to those who do not develop postoperative delirium
Detailed Description
Postoperative delirium in older people may be contributed to by intrinsic brain vulnerability such as pre-existing dementia. Some cognitively intact older people also experience postoperative delirium and in these patients some go on to develop later dementia. The investigators propose that postoperative delirium may be an unmasking of covert brain vulnerability by the dyshomeostasis of the anaesthesia/surgical intervention.
In people with dementia or mild cognitive impairment, electroencephalography (EEG) studies have shown slowing of brain wave activity, especially in the back of the brain.
Processed electroencephalography, using a limited number of channels, is routinely used during anaesthesia to aid assessment of anaesthetic depth of the patient.
In this study the investigators will assess the feasibility of acquiring EEG data from the front and back of the brain. The investigators will also explore the data for early signals of brain vulnerability
Study Design
- Study Type
- Observational
- Observational Model
- Cohort
- Time Perspective
- Prospective
Eligibility Criteria
- Ages
- 65 Years to — (Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- •≥ 65 years old
- •Elective, moderate/major, non-neuro, non-cardiac surgery
- •Ability to give informed consent
Exclusion Criteria
- •Preoperative cognitive impairment
- •Current systemic infection
- •Current use of medication that may modify EEG
- •History of neurosurgery/significant head trauma
- •Presence of neurological diseases including overt stroke, dementia, epilepsy, multiple sclerosis, Parkinson's disease, intracranial tumours and other significant neurologic disorders
- •Current significant psychiatric conditions such as severe depression.
- •Palliative surgery
Outcomes
Primary Outcomes
Feasibility of acquiring frontal and posterior EEG data from the Narcotrend monitor during the preoperative and intraoperative period
Time Frame: Approximately 1 - 2 hours per participant
Feasibility will be assessed by the ability to get preoperative and intraoperative epochs of EEG that clearly demonstrates the different brain wave bands (alpha, theta and delta)
Secondary Outcomes
- Preoperative brain wave differences(Approximately 10 minutes per participant)
- Change in brain wave power due to induction of anaesthesia(Approximately 1 hour per particpant)
- Intraoperative brain wave patterns(Duration of surgery or 2 hours (shortest option))